Coating-machine.



F. E. GOLDSMITH.

COTNG MACHINE.

APPLlcATIoN FILED FEB.27.1913.

Patented May 30, 1916.

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GOATING MACHINE. APPLICATION FILED Fa.. 27. I9I3.

Patented May 30, 1916.

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F. E. GOLDSVHTH.

vCOMING MACHINE. APPLICATION FILED FEB. 27. 191s.

Patented May 30, 1916.

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COATING MACHINE.

APPLICATION FlLED FEB. 27. 1913.

Patented May 30,1916.

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COATING MACHINE.

APPLICATION FILED FEB. 21. Isls.

Patented May 30, 1916.

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APPLICATION FILED FEB. 27. 19l3.

Patenfed May 30, 1916.

Tm: COLUMBIA PLANOGRAPH to., WASHINGTON, D. C.

F. E. GOLDSIVIITH.

COATING MACHINE.

APPLICATION FILED FEB. 27. 19I3.

LI MJMU. Patented May 30, 1916.

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APPLICATIUN FILED FEB. 27. 1913. Patented May 30 Il SHEETS-SHEET B- @wwwai *www @Nv www M WJTNESSES J TME COLUMBIA PLANQGRAPH c0.. w ASHlNc1oN.D. r

F. E. GOLDSIVIITH.

COATING MACHINE.

APPLICATION FILED FEB. 2?. Isla.

Patnted May 30, 1916.

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TIIE COLUMBIA PLANOGRAPH CD., WASHINGTON, D. c.

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COATING MACHINE.

APPLICATION FILED FEB. 2. 1918.

Patented May 30, 1916.

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`APPLICATION FILED FEB. 27. |913.

Patented May 30, 1916.

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WIT/V55? i WIFE@ VF T1 FREDERICK E. GOIiDSMITH, OF HAMILTON, OHIO,ASSIG-NOR 'IO CERAMIC MACHINERY COMPANY, OF HAMILTON, OHIO, ACORPORATION OF OHIO.

COATING-MACHINE.

Application filed February 2'?, 1913.

.To all fav/wm 'it may concern Be it known that I, FREDERICK E. GOLD-snirn, a citizen of the United States, residing at Hamilton, hio, haveinvented certain new and useful Improvements in Coating-Machines forvliles and Similar Objects, of which the following is a specification.

My invention relates to .machines for coating tiles and similar objects.

IUne of the principal objects of the invention is to provide vfor veryeasily and quickly removing and replacing the coating reservoir, coatingdevices, such as coating rolls, agitator, and carrying belts.v Provisionfor this is made by constructing the frame so that the coating reservoirmay be drawn out at one side; by arranging the coating devices and beltsso that they are supported or driven, or both, from one side of theframe, so that these parts may be drawn out at the open side of theframe. Movable supports are also provided for certain of the removableparts at the Open side of the frame so that after the removable partsare inserted they may be properly supported.

Other objects are to interconnect the driving means with one or more ofthe above mentioned movable supports to prevent improper driving during:removal or replacement of parts; to provide simple and effective meansfor supplying two coating devices from a single reservoir; to so conveyand dry tiles between the two coating devices that injury to the coatedsurface is prevented; and to quickly and easily adjust the belts and toadapt the adjusting devices to one-side supporting arrangement.

The foregoing and other objects and advantages of the invention will besufliciently explained hereinafter.

The invention consists in instrumentalities and combinations thereof forcarrying out the foregoing and other objects, as will be explained.

The accompanying drawing shows one eX- emplifying structure in which theinvention is embodied, but it is to be understood that the invention iscapable of embodiment in many different forms.

In the drawing: Figure 1 is a three-quarter perspective of a machineembodying the invention. looking toward the front or open side of theframe and showing all Specification of Letters Patent.

ship to each other.

p Patented May 30, 1916..

Serial No. 751,00).

parts' in working position. Fig. 2 is a perspective lfrom the same sideof the machine but looking from the other end, the coating tub and rollsbeing removed, and the movable supporting devices for the removed partsbeing shown in unlocked position. Fig. 3 is a front side elevation. Fig.i is a. top plan. Fig. 5 is a longitudinal section. Fig. 6 is atransverse section in the vertical plane of the agitator shaft. Fig. 7is a transverse section of the upper part of the machine in the plane ofthe lefthand coating roll shaft, as shown in Figs. 3 or 5. Fig. 8 is avertical section in the transverse plane or' the machine 'through thepart of the frame carrying the lever which connects the swinging-latchfor the agitator shaft with the drive clutch therefor. Fig. 9 is aperspective view of the parts employed in latching and driving theagitator removed from the machine, and placed in approximate operativerelation- Fig. 10 is a top plan of one of the adjustable belt carriers.Fig. 11 is a view of the same from the side of the machine or the endsof the belt rolls. Fig. 12 is a vertical section in the longitudinalplane of the machine through the belt adjusting devices. Fig. 13 is afront end elevation of Fig. l0. Fig. 14 is a vertical section on theplane al1-m of Fig. 11. Fig. 15 is a vertical section on the planejl/-g/ of Fig. 1l. Fig. 16 is a perspective diagram of the drivingmechanism, the framework and most other parts not concerned with drivingbeing` omitted. Fig. 17 is a vertical section through a part of thedriving mechanism. Fig. 18 is a vertical section of the same mechanism,looking from the opposite side. Fig. 19 is a horizontal section of partof the driving mechanism. Fig. Q0 is a detail of the driving mechanism,partly in section. Fig. 21 is a sectional detail of the drivingmechanism. Fig. 2Q is a diagram of a modified form of coating roll inrelation to one of the coating roll adjusters. Fig. 22a is a sectionaldetail of one of the coating roll adjusters. Fig. 23 is a perspectiveview of the same. Fig. 24C

is a diagrammatic perspective view or' the adjusting devices for one ofthe adjustable tile feed rolls. Fig. 25 is a perspective of one of thecoating screens. Fig. 26 is a perspective detail of part of thelatch-operating mechanism for the swinging vcoating heads.

Vlater-'als 3, 4, rest over the vertical frame members 1 and the middlelateral 5 springs from the topV member 2 intermediate the end laterals 3and 4, The outer end, or the end ofthe lateral member 5 nearest to theeye in Figs. 1, 2,. 3, etc., is, therefore, free and unsupported. Asbest understood in Figs. 4 andv 5, twoY overhanging housinguarms orbeams 6, 7, are provided for the coating rolls and certain other parts.These beams have bases 8, 9, resting ontheback stretch of top frame 2,one on each side of the center, horizontal member 5. These beams stretchacross the machine', as shown in Fig. 4, and Vtheir outer ends areunsupported, as clearly seen in Figs. 1, 2, 3, 6 and 7. By thisconstruction a lar'geiopen fronted recess is left Within the frame underthe middle lateral 5 and beams 6 and 7 and between the end frame members1, as clearly shown in Fig. 2, to receive the coating tub 10, shown inthat figure pulled out and removed from its carriage and resting on thefloor in front of the machine. The end and top frame members may besuitably connected at the back to form a rigid structure by braces 1,1", or the like. Y

. Coating for ceramic articles, such as tiles, consists of a fluidcarrying m suspension various finely ground, solid ingredients, whichhave a strong tendency to precipitate and to clog up, more or less,Working parts, such as the coating devices. Tov provide means forreadily cleaning the parts, and

also to provide for changing the coating tub and coating devices andother parts when it is desired to change the character of coatingmaterial, various arrangements and combinations of, parts are hereinprovided. As already `described,'the open-front tub-space vin the frameaccommodates the removable tub 10, and to facilitate removing andreplacing the tub, a movable truck or carriage 11 is provided for it.This truck has a rectangular frame with end cross pieces 12, andV thesecross pieces have at each end a Y cleat 13. The tub, desirably, has anapproximately A semi-circular bottom 14, and lto properly support thetub on its truck and to prevent it rolling over when removed therefrom,it is provided With a frame 15 having straight, bottom, side members 1Gadapted to rest on the side members 12 of the truck andjust Within thecleats 13. In this yWay the tub is accurately located upon the truck butmay be easily and quickly removed and replaced thereon without specialfastening devices when the truck is in extended position, as shown inFig. 2. To further locate the tub in the longitudinal direction of themachine, one of the frameA members of the truck may be further providedwith a pin 17, adapted to enter a hole in one of the tub frame members1G, as best seen in Figs. 1 and 3.

The main frame is provided with transverse rails 18 Which may be in theform of a channel section, and on these rails run Wheels 19 carried bythe tub truck. The truck is also provided at each side with a rack 20(Figs. 5 and G), and these racks are engaged by pinions 21 carried onshaft 22, mounted in fixed bearings in the frame. Shaft 22 also carriesa sprocket 23 (Fig. 3), and from this a chain 24 leads to anothersprocket 25 on a hand-wheel shaft 26 mounted in a fixed bearing 27 andcarrying a hand- Wheel 28 at a convenient elevation, so that theattendant may easily run the tub and tub truck in and out by rotatingthe hand- Wheel. The provision of two racks and pinions mounted on thesame shaft insures that the truck will run evenly Without binding in itsguides. The provision of a channel-shaped truck also provides for thesupport of the truck when in extended position, as shown in Fig. 2. Theoutward movement of the truck is limited by end pieces or stops 29 atthe ends of tracks 18.

A plurality of tubs, each provided with a frame 15, and all necessaryappurtenances, such as coating rolls with their troughs and agitator,may be provided, so that a very rapid change may be made by simplyfreeing the tub and its associated parts from operative relation withthe machine and running the tub out, lifting it off the truck,replacing' it by another tub with appurtenances, running the truck backand coupling up the parts again. For this reason the tub is usually madeto carry practically all parts ofthe machine with which coating comes incontact, so that in changing tubs all these parts are simultaneouslychanged aud great economy of time is secured.

The appurtenances carried by the tub include (Figs. 2, 5, and others)the feeding and agitator frame 30, front coating-roll housing 31, andthe rear coating-roll housing 32. For supporting these parts, the tubframe (in a preferred construction) comprises top side members 33, towhich the ends of the coating housings are secured. These side membersalso carry tracks 34 to support the tubular shaft 35 of frame 30 when itis released from operative position.

To insure proper location of the coating housing in the machine, theouter face of each housing is provided with grooved Ways is run out theends of these shafts rest in the part of the attendant.

revolving in a bearing 43, and another spindle 44 which, foridentification, may be called an idler spindle mounted in a bearing 45carried by swinging head 45 mounted on each of the beams 6, 7. Fig. 7shows the spindles and other parts adjacent to the i rear roll 39, andFigs. l, 2, 3 and 6 best illustrate the swinging heads. It is to beunderstood that the coating rolls and their supporting and drivingdevices are substantially identical except with respect to a fewfeatures of the driving mechanism, the differences in which will belater explained, and a description of one of the coating rolls andrelated parts will answer for both unless otherwise mentioned. Spindle42 has a tapered end 46SL engaging a socket in the driving end ofroll-shaft 40, and also has a clutch member 47 engaging clutch memberscarried by the shaft for driving. When the tub is run into position, thecoating roll is supported, as above explained, in line with drive-shaft42, and tapered end 46 automatically enters the shaft, and member 47engages for driving without attention on rlhe tub is, of course, run inwhile the swinging head 4G is raised, as shown in full lines in Fig. 2,and in dotted lines in Fig. 6. |The swinging head is then dropped,bringing the tapered end 48 of idler spindle 44 into engagement withsocket 49 in the outer end of the roll shaft. To permit this swingingengagement of the idler spindle, to allow for slight variations inlength of the roll shaft, to permit proper engagement of clutch 47, andfor other reasons, idler spindle 44 is yieldably held by a spring 50engaged between a shoulder on the spindle and a plug 51 in the end ofbearing 45. The spindle is further provided with a stem 52 extendingthrough the plug and provided with a knob 53, so that the spindle mayberetracted by hand to assist in engaging it with the roll-shaft as thehead is swung down, or for other reasons.

rlhe swinging head is in the general form of a yoke having arms 54(Figs. l, 3 and 6) embracing the end of the corresponding beam 6 or 7and pivoted to it at 55. The heads are latched in open or closedposition by pin 56 carried by a socket in one of the arms (see also Fig.26). This pin has a notch 57 engaged by the end of one arm 5S of abell-crank carried on shaft 59 journaled in bearings 60 on the head. Thebell-crank shaft is urged by a spring 6l in the direction to engage thepin eitheiI with socket G2 or socket 63 carried by the beam. Between thesockets runs a sector-shaped rail 64' to hold the pin in retractedposition between. the two sockets. The other arm G5 of the bell-crank isconnected by a link G6 with release lever 67 pivoted at the baseA of arigidly mounted handle 68 carried by the head. To release thecoating-roll, latch lever 67 is pulled while the handle 68 is grasped..This withdraws pin 56 from socket 63. An upward pull on handle G8 thenswings up the head to the position shown in Fig. 2 and in dotted linesin Fig. 6. Lever 67 then being released, spring 6l throws the lockingpin into socket G3. The lever may be released atany time after the pinhas left one socket and then the pin will ride over the sector 64 untilit engages the other. To rengage the coatingrolhthehead being in itsupper or free position, release lever is similarly pulled, the headswung down and again locked, the idler spindle 44 engaging theroll-shaft toward the end of this movement.

When the tub is run in, the hollow shaft 35 on the agitator frame issupported by brackets 34 in line with spindle 69 mounted in bearings 70on the frame. This spindle is suitably tapered to easily engage thehollow shaft. Upon the spindle is mounted a slidable clutch 7l having asingle tooth or jaw 72 to engage a corresponding socket in the inwardend of shaft Clutch 7l is urged to engagement by a spring 73. The singletooth and socket arrangement of the clutch insures that it will engagewith the agitator shaft for driving only when the shaft is in properrelative position to the driving mechanism. To positively move shaft 85in and out along with the tub, the inward bracket 34 engages with asector slot 74 in the shaft-hub adjacent to the clutch. The tub may berun in at any time without respect to the position of clutch 71. Iftooth 72 is not opposite the socket in shaft 35, the clutch will bepressed back against its spring until in the driving movement, as willbe later explained, it oscillates to such a point that the tooth isopposite the socket, whereupon the tooth will spring into the socket andproper driving cf the tator and feed frame will be commenced.

For the support of the outer end of the agitator shaft, the main framehasY anl upwardly archedV member 75 carried by the middle-lateral on thetop plate, and otherwise suitably supported and braced as may is anidler spindle 78 having a tapered end engaging a socket in the end ofshaft 35. This spindle is urged in by a spring 7 9 and is provided witha stem 80 and knob S1 similar to parts already described in connectionwith the coating rolls. Frame member 75, as clearly shown in Figs. 1 and4, is provided with a socket 82 to receive the end of spindle `7 8 whenthe arm 7 6 is in idle position. vTo free shaft 35 and permit the tub tobe removed, knob 81 is pulled out and armV 76 swung up to the positionshown in Fig. 2. The knob being released, the end of spindle 7 8 thenenters socket 82 and the arm is then held up out of the way. When thetub is run back into place the spindle is rengaged with shaft 35 in anobvious manner.

The coating-feed V`and coating-mechanism and operations will now bedescribed: The agitator frame 30 has two arms 83 connected by straps orrods S4, and across these rods are placed agitator strips 85 close tothe tub bottom. As the agitator lis oscillated bythe driving melianism,as will be later described, the agitator strips are swept through thecoating material near the tub bottom and keep it thoroughly stirred andmixed. Across each of the arms, at the outside, is placed a feed scoopor bucket 86, preferably of fairly deep V-shape, as shown, and providedwith outer lips or flanges 87. These buckets alternately dip into thecoating material and elevate it to the coating devices. In so doing theyat the same time assist greatlyl in the stirring of the mixture. Eachcoating housing 31 is provided with a bucket-well or passage 88 open atthe bottom and defined by the outer wall of the housing and an inner,approximately vertical wall 89. Vithin .this well is a'device 90 whichmay be identified by the name discharger,adapted, as the bucket rises,to enter into it and to cause the discharge of the contained coatingfluid. This iiuid is Vreceived by a'pan or trough 91 below the coatingroll. To prevent improper escape of the coating material, the spacebetween the discharger and the outer wall of the housing is closed atthe top, Vas indicated at 92; and to cause most of the material to bedischarged toward the coating roll, the outer wall 93 of the dischargeris made to fit quite close to the outer wall 94 of the bucket. Moreclearance may be left between upward escape of the coating material andto direct it into the pan, there is, continuous with the discharger, aninwardly-directed flange 95 extending over and downward toward the panand fairly close to the coating roll. To further prevent upwardsplashing of coating material which might pass flange 9 5, there is aguard or cover 96 somewhat above said flange and as close as practicalto the coating roll. On the opposite side of the coating roll, the wallof the housing extends upward and inward fairly close to the roll, asindicated at 97.

In coating, the coating rolls are continually rotated and the feed andagitator frame is continuously oscillated so that at regular intervalsone of the buckets 86 rises toward the corresponding discharger 90carrying a load of coating fluid, and this is squeezed out by thedischarger into pan 91, wherein the coating roll dips and carries up asuitable quantity of coating material to be deposited upon the tiles.Excess material flows away from the pan over its edge 98 and is to bescreened before it returns to the tub to remove undesirable Substances,such, for instance, as fragments of tiles, which may drop into the pan.For this purpose, below the discharge edge of each pan is placed ascreen 99 carried by a fralne 100. At one side the screen is pivoted tothe tub frame by trunnions 101, and the other side of the frame isloosely supported on the tub frame by pins 102. The screen is V-shapedin end elevation, as clearly shown in the perspective view 25, and atthe center of the V there is a transverse wearing plate 103 bridging thescreen frame. As the agitator rises toward one of the screens, theagitator arm 83 strikes the wearing plate 103 and slightly raises thescreen, and when the agitator again recedes, the screen is dropped uponpins 102 and sufliciently olted to keep it clear and permit the freeflow of coating material through it back to the tub.

The buckets usually supply coating to the pans considerably in excess ofthe amount required for use, and the pans are thus continuously iushedout with fresh material and the coating available for application to thetiles is, therefore, always in the best condition.

Above each coating roll is placed a pressure roll 104 to apply suitablepressure to the tiles as they pass for coating (see Figs. 5, 7, andothers). Each pressure roll is carried in a housing 105, in the ends ofwhich are provided bearings 106 for the roll-shaft 107. For theadjustment of the pressure roll the housing is arranged to slide up anddown on posts 108 (see also Fig. 27). At each end of the housing thereis a rotatable screw 109 engaging a part of the housing. These screwsare suitably journaled in the corresponding beam 6 or 7, and at theirupper ends carry bevel pinions 110. Each beam also carries a transverseadjusting shaft 111 provided with bevel pinions 112 to engage pinions110, and the shaft is also pro vided with a hand-wheel 113 for rotatingit. The housing may be locked in adjusted position by means of a splitsliding bearing 114 engaging the outer one of posts 108, and a set screw115 to clamp the bearing upon the post. This screw is accessible througha hole 116 in the outer end of the beam.

Driving means for the pressure roll adapted to accommodate its verticaladjustment will be later described.

Tiles are supplied to the lirst coating roll 38 by a feed belt or apron117 passing over a drive pulley 118 and an adjustable idler pulley 119.The upper stretch of this belt runs over plate 120 and adjustment of theidler pulley is eeeted by screws 121 engaging the plate and carrying thepulley bearings at their outer ends (see Figs. 4 and 5). This belt istensioned by a tension pulley 122 engaging the lower stretch, screws 123engaging the pulley bearings and hand wheels 124 for the screws. Betweenthe delivery end of the belt and the coating roll is a verticallyadjustable tile -engaging roll, which may be identified by the nametilting roll 125, the adjustment devices for which are shown in diagramin Fig; 24, and in assembled position in Figs. 1, 4 and 7. The rollshaft 126 rotates in bearing blocks 127 and these in turn are carried bypins 128 on vertically adjustable members 129. These members carryupwardly extending pins 13 0 having notches 131 to receive the outerends of adjusting levers 132. These levers are fulerumed at 133 to thebeam, one at each side. The inner ends of the levers are pro-vided withforks 134 which engage an annular groove 135 in adjusting screw 136,screwed into the beam. By properly rotating this screw, both ends of theroll shaft are equally raised or lowered to regulate the angle of thetile as it is delivered to the coating device.

Between the two coating rolls is a belt 137 to carry tiles from thefirst coating device to the second. The rearward end of this belt iscarried by a drive pulley 138 adjacent to the tilting roll 125 of thesecond coating device. The shaft 139 of this pulley rotates in bearings140 adjustably carried by screws 141. The screws are in turn supportedby a stationary part of the machine, such, for instance, as the heater,located between the upper and lower stretches of the intermediate belt137, and which will later be described. Bv means of these screws theposition of the drive pulley 140 in relation to the second coatingdevice may be regulated, and also the angle of the pulley in atransverse direction may be slightly varied to make the belt run true,The forward end of this intermediate belt, that is the end adjacent tothe first coating device, is carried adjustably, both as to position andtension, by adjusting mechanism shown in Figs. 10

to 15 inclusive. This comprises a block-like member 142 carried by theframe top plate at the rear side of the belt. ln this is a longitudinalslideway 143 and in this is mounted a slide 144. The rear face of slide144 is provided with a rack 145, and opposite this rack at one point,block 142 has a recess 146 intersected by vertical adjusting shaft 147.On this shaft, in the recess, is pinion 148 engaging the rack. On theupper end of shaft 147 is an adjusting hand-wheel 149 and winged,lock-nut 150. Slide 144 also has a guideway 151, and in this is mounteda movable head 152 having on its upper face a ratchet rack 153. Abovethis ratchet, slide 151 is provided with a slot 154. A tension adjustinglever 155 is pivoted by means of a slot 156 upon pin 157 supported byears 158 at each side of slide slot 154. The upper, end of the lever hasa. hand-knob 159, and the lower end is provided with a pawl 160 engagingratchet rack 153. In slide slot 154 is also mounted a retaining pawl 161pivoted on pin 162. This pawl has a lingerpiece 163 for convenientreleasing. Extending from block 142 is an apron 164, the outer end ofwhich supports the outer end of the shaft of fixed belt pulley 165.. Theinner end of this pulley is supported by block 142. Slide 144 carries anapron 166, the outer end of which supports the outer end of movable beltpulley 167. The inner end of this pulley is supported by the slide 144.Movable head 152 carries an apron 168 supporting the outer end ofmovable belt pulley 169, the inner end of which is carried by the head.Fig. 5, taken in connection with Fig. 11, shows the operative featuresof the construction just described. Pulley 165 is always in fixedposition. The belt passes under and around this pulley, back and aroundpulley 167, forward again and around pulley 169, and so back on itsupper stretch to the drive pulley 138, previously mentioned. Theposition of the front end of the belt as determined by the position ofpulley 169 may be varied to bring the receiving end of the belt closerto the coating roll 38, or farther away from it, without varying thetension of the belt, by rotating hand-wheel 149. This moves slide 144,upon which head 152 carrying pulley 169 is normally rigidly fixed. Thedifferential effect caused by the simultaneous movement of the twopulleys 169, 167, thus has no eiiect upon the length of the belt, theslack created at one point being taken up at another. To vary thetension of the belt, however, it is only necessary to manipulatepawl-lever 155 and detent pawl 161. To tighten the belt, the leverhandle is simply depressed, causing pawl v160 to force the movable headforward one notch at a time, the head being prevented from returning bya detent pawl 161. To loosen the belt, it is only necessary to slightlylpress upon the adjusting lever, whereupon detent pawl may be raised, andwhen the adjusting lever is released the head may then go back to anyextent de-v sired. In this way, the intermediate belt may be practicallyimmediately yslacked ofi to remove it from the machine for cleaning, assometimes becomes necessary. It will be observed that, as abovedescribed, the belt pulleys are allsupported from the rear side of themachine, thus, although the drive pulley 138 has an outward bearingcarried the ratchet 153, as previously described.

L In order to insure straight running of the belt in connection withadjustment of drive pulley 138 previously described, the outer ends ofpulleys 165, 167, are connected with theirV respective supports byscrews 170 .'(Figs. 10 and 11)V and'nuts 171. By this means the angle ofthe pulleys may be Y slightly changed for the purpose mentioned.

The rear or carry-ofi' belt 172 takes tiles from the rear coating roll39 and delivers them in anydesired way, and the receiving 'vend of thisbelt may be provided with adjusting mechanism substantially similar tothat previously described in connection with belt 137.

Without means to prevent it, the moist .coating on 4tiles passing fromthe front coating roll would'adhere more or less to the intermediatebelt 137, and this adhering coating would damage the coated faces ofsubsequently coated tiles. To Yprevent such adhesion, there ispreferably provided between the upper and lower stretches of belt 137 aheater 173 (Figs. 4 and 5). This may Vvary greatly in character. Forinstance, an elec- .tric heater may be employed. But in the embodimentshown, the heater consists in the steam-box supported from the rear by abracket 174 and provided with suitable supply and yreturn steam pipes175 and valves 176. The belt Vpassing close to the steam chest is keptsufficiently dry, and in this wayV adhesion of coating is prevented.

The driving mechanism will now be described. One of the end framelnembers carries. main shaft. 177 on which are fast and loose pulleys178 for driving from any suitable source. A belt shifter 179 is arrangedin connection with the pulleys. At the front of the machine, in gear box180, are changeable gears connecting main shaft to driveshaft 181. In agear box at the rear side of the machine, shaft 181 is connected bybevel gears 182 with vertical shaft 183. In a vgear box 184, thisvertical shaft is connected by bevel gears 185 with longitudinalshaft186. This leads to the rear of the machine, there being interposedbetween the two coating devices, however, a flexible section 187,consisting of a tube fitting with slight looseness on solid parts of theshaft and connected to them by pins 188, whereby slight disalinements ofthe shaft sections are compensated for without any bad effects. Both thecoating devices, including the tilting roll of each, and the drivepulley 138 of the intermediate belt, are driven from this longitudinalshaft 186. The driving parts and arrangement for the forward coatingroll and tilting roll are the same as for the rear, with the exceptionthat adjacent to the rear coating driving mechanism provision is madefor driving the just mentioned belt pulley 138. The driving parts forthe rear coating device are therefore fully shown in the diagrammaticFig. 16, while the parts for the forward coating device are only partlyindicated, for the sake of greater simplicity and clearness. For eachcoating device, then, there is on shaft 186 a bevel gear 189, driving atransverse shaft 190 through bevel gear 191. On shaft 190 is a longpinion 192. Pivoted on shaft 190 is arm 193. Adjacent to this, andpivoted on shaft 107 of pressure roll 104i, is an arm 194. The free endsof these two arms carry a shaft 195, on which is mounted what may bedescribed as a floating gear 196. At one side this engages with the longpinion 192 on shaft 190, and on another side, in turn, engages a pinion197 on pressure roll shaft 107. As the pressure roll is verticallyadjusted by means which have been previously described, it is at thesame time driven in any position from shaft 90 by floating gear 196,which is kept in proper position to drive gear 197 from pinion 192 bythe pivoted arms just above mentioned.

The coating roll drive-spindle 42, as shown in Fig. 7, extends towardthe rear of the machinev and is provided with a pinion 198 engagingpinion 192.- This is the drive for the coating roll. Tilting roll 125,which, as previously described, is vertically adjustable, is connectedwith a non-adjustable shaft 199 by a universal coupling 200, similar tocoupling 187 previously described in connection with shaft 186. In thisway, while the axis of 199 is stationary, the tilting roll may beadjusted vertically and still be properly driven. Shaft 199 is providedwith a pinion 201 engaging pinion 192, and in this way the tilting rollis driven. intermediate belt drive pulley 138 is connected by auniversal coupling 202 with non-adjustable shaft 203, and in this waythe adjustment of the drive pulley is permitted without interfering withits drive. Shaft 203 is provided with a pinion 20/1- engaging pinion 192and in this way the intermediate pulley is driven.

Returning to vertical shaft 183: Nithin gear 'box 184 this carries abevel pinion 205 engaging a similar pinion on a. lateral shaft 206,mounted in a fixed bearing. rllhis is connected by a universal coupling207 with the end of the shaft of front belt drive pulf ity 118.

Returning to the main drive shaft 177: rlhis is provided within gear box180 with changeable gears 208 driving transverse shaft 209, at therearward end of which is a crank-pin 210. From this a yieldable pitman211 drives crank 212 mounted on agitator drive spindle 69 (see Fig. 6).The hub of this crank carries two forwardly projecting splines 213engaging splineways 214 in clutch 71, previously described. By thismeans the agitator clutch 71 is caused to continuously oscillate inaccordance with rotation of shaft 209, and at the same time the engagingand disengaging movement of the clutch previously mentioned ispermitted.

Adjustment of the pitman-stroke is effected by providing in the crank212 a slot 215, and in this slot a bearing block 216 is mounted andadjusted vertically by a screw 217. ln this bearing block is a bearingpin 218, to which the forward end of the pitman 211 is connected. Thedetails of construction of the yieldable pitinan are not a part of thisinvention. This yielding feature is desirable to prevent breakage of theparts if there is any obstruction to the movement of the agitator frame.

At its rear end, longitudinal shaft 186 carries an extension 219 onwhich a bevel gear 220 drives similar gear 221 on transverse shaft 222,and this in turn is connected by bevel gears 223 with a longitudinalshaft 224 extending rearward to drive the carryoli' belt 172 from itsrear end. The details of the drive of this carry-off belt may varyconsiderably and are not a necessary part of this invention.

It has previously been explained how the coating housings on the tub areinterlocked with the main frame of the machine in respect to thevertical and longitudinal position of the machine when the tub is runin. Means for locking the coating housings and, through them, the tub,in respect to the transverse direction of the machine, will now bedescribed: Near their outer ends the coating housings carry on theirinner faces sockets 225 (see Figs. 2, 3 and l). Frame piece 75 carriesat each end a locking bolt 226 movable in and out in a socket in theframe piece (see also Fig. 9). When the tub is in operative position,these bolts are extended into sockets and prevent improper lateralmovement of the tub and its appurtenances in an obvious manner. llhebolts are arranged to be automatically withdrawn when the agitator shaftis released, by swinging up arm 76, previously described. For thispurpose the hub of arm 76 is provided with ears 227. From one of theseears a link 228 runs to one of the bolts 226. This link is upwardlyarched at 229n to conform to the arch of frame piece 75 and to avoidinterference with the agitator shaft and its brackets when the tub iswithdrawn. The other ear 227 is connected with the other bolt by a link229. These links are carried within a channel section of frame piece 75.Evidently, when arm 76 is swung` up, after releasing spindle 78 from theagitator shaft, links 228 and 229 are moved so as to withdraw the boltsfrom sockets 225, and the tub is then released for withdrawing.Similarly, restoration of arm 76 to operative position again locks thetub and the movement of the arm to opera` tive position evidently cannotbe accomplished until the tub is in proper position with the sockets inline with the bolts.

An interconnection between the arm 7 6,'

the tub locking means, and clutch 71 of the agitator drive, is providedas follows: Ti'ansversely arranged under frame piece 5 (see also Fig. 8)is a lever 230 fulcrumed at 231. The outer end of this lever isconnected by a link 232 with link 229 previously mentioned. rEhe innerend of the lever is connected by a link 233 with one arm ofclutch-operating bell-crank 234-, best proper driving of the agitatorand feed mechanism can, therefore, be accomplished until all parts arerestored to operative condition.

Fig. 22 shows diagramn'iatically a modified form of coating device. Inthis, the ordinary coating roll is replaced by a core 38 on which hangsa loose eccentric sleeve or shell 238. Adjusting devices, shown iiienlarged detail in Figs. 22a-and 23, are einployed to regulate theangular position of this shell. The adjusters are shown in assembledposition in the machine in Figs. 1, l and 5. rlhey comprise tubularsockets 239 carried by beams 6, 7, in which are fitted sleeves 2410. Thetops of the sockets are ias parts 249 of the stems are sleeves 250provided at their outer ends with recessed, enlarged knurled heads 251.These headed sleeves are secured rotatably against shoulders'248 by nuts252 on the ends of the stems. The sleeves are also provided with annularYshoulders 258 and belowV these shoulders there are cut longitudinalslots l254 entered by the ends of screws or studs V,255"in caps 241.

TwoV adjusters consti-noted as described are provided' for eachV coatingroll, one being located near each end of the roll, as shown in theassembly views just mentioned. In the position ofparts shown in Fig.22a, springs243 urge the adjuster rolls 246 into engagement with coatingrolls 238. If it is desired to run the coating shells without adjusters,or if ordinary rolls are to'be used, as shown in the assemblyv views,the adjusters are retracted by pulling up knurled heads 251 until theheads of sleeves 250 are above studs 255. Thereupon, the knurled Vhea-dsare rotatedslightly, bringing the slots a 254 out of register with thestuds, which then engage under the ends of sleeves 250. The adjusterrolls 2,46 are held retracted and out of engagement with the coatingdevices. The retraction of the adjusters may be effected by handmanipulation of each Y one, Vbut forgreater convenience and also toprovide ,for automatic withdrawal of the adjusters when the coatingdevices are to be withdrawn from the frame, means are provided forsimultaneously withdrawing both of the adjusters when the movable headfor the corresponding roll is lifted to release the roll. Such meansconsists of transverse rods 256 pivoted to the beams in bearings 257.These rods are bent to form loops 258 partly surrounding each Vof thesleeves 250 Vjust beneath shoulders 253. YEach rod also has a part 259overlying'the cam 260 carried by the adjacent head 54 and centered uponthe pivot axis of the head. Now, evidently, when the 'head is raised,cam 260 will raise rod 256 and thereby retract both of the adjusters andwill hold them retracted as long as the head is raised. IVhen the headis loweredto active position, both the adjusters are permitted to returnunder the impulse of their springs. But, of course,

at any time the adjusters may be locked out of action so as not to getin the way when ordinary concentric coating rolls are used by. handmanipulation, as above described.

The principal object of this invention, as will be understood from theforegoing description, is to provide a machine that will deposit twocoatings upon a tile as the tile is passed once through the machine. Inthis way a heavy total coating may be applied if necessary, and if amoderately light total coating is applied it may be of better qualitythan when the total coating is applied by a single coating device.

I have discovered that two coatings applied successively to a tile will,make a better product than one heavier coating. T o make the machine assimple as possible, it has been designed to arrange the coating supplyin such a manner that one tank and pumping or feeding device will supplyglaze or coating to both coating elements. To make the machine more orless universal in its work the tank and all the coating supply parts aremade removable for washing or for supplying duplicate parts for adifferent color or composition of coating matter.

Many changes in structural features may be made without departing fromthe principles of my invention.

I claim 1. In coating mechanism for tiles and the like, in combination,a frame open at one side, object feeding mechanism on the frame, acoating receptacle located within the frame, and means for inserting andremoving the receptacle through the open frame side, a coating device,idle supports therefor upon said receptacle and quickly attachable drivesupports for the coating device upon the frame.

2. In coating mechanism for tiles and the like, in combination, a frame,object feeding mechanism thereon, a coating receptacle, a coatingdevice, a fixed support at one side of the frame for the coating device,and a movable support at the other side of the frame for the coatingdevice.

3. In coating mechanism for tiles and the like, in combination, a frame,object feeding mechanism thereon, a coating receptacle, a coatingdevice, a fixed support at one side of the frame for the coating device,a movable supporting device at the other side of the frame for thecoating device, and means for feeding coating from the receptacle to thecoating device.

4. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for objects such as tiles, a coating device, afixed support for said device at one side of the frame, and a movablesupport for said device at the other side of the frame.

5. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for objects such as tiles, a coating device, afixed support for said device at one side of the frame, a retractablesupport for the support of the coating device at the other side of theframe, and a latch for holding the retractable support in engagementWith the coating device.

6. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for tiles or the like, a coating roll, a fixedbearing on the framek for the roll at one side thereof, and a movablebearing on the frame for the roll at the other side thereof.

7. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for tiles or the like, a coating roll, a fixedbearing on the frame for the roll at one side thereof, movable bearingon the frame for the roll at the other side thereof, and a latch forholding the movable bearing in engagement lWith the roll.

8. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for tiles or the like, a coating roll, a drivingspindle engaging the roll at one end, a fixed bearing lfor said spindle,a bearing near the other end of the roll, and a retractable spindle insaid last named bearing adapted to engage the adjacent end of the roll.Y

9. In coating mechanism for tiles and the like, in combination, a frame,feeding means thereon for tiles or the like, a coating roll, a fixedbearing near one end thereof, adrive spindle mounted in said bearing andengaging the roll, another bearing near the other` end of the roll, anidler spindle mounted in said bearing and detachably engaging theadjacent end of the roll, and means for normally holding the idlerspindle in engagement with the roll.

10. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles or the like, a coating roll, afixed bearing near one end thereof, a drive spindle mounted in saidbearing and engaging the roll, another bearing near the other end of theroll, an idler spindle mounted in said bearing and detachably engagingthe adjacent end of the roll, means for normally holding the idlerspindle in engagement with the roll, and means for retracting the idlerspindle.

11. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles or the like, a coating roll, afixed bearing near one end of the roll, a drive spindle thereindetachably engaging the roll, a movable bearing near the other end ofthe roll, and an idler spindle in said bearing detachably engaging theroll.

1:2. In coating mechanism for tiles and 5 the like, in combination, aframe, feeding means thereon for tiles or the like, a coating roll, afixed bearing near one end of the roll, a drive spindle thereindetachably engaging the roll, a movable bearing near the other end ofthe roll, an idler spindle in said b-earing detachably engaging theroll, and a latch for securing the movable bearing in active position.

13. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles or the like, a coating roll7 afixed bearing near one end of the roll, a drive spindle in said bearingdetachably engaging the roll, a movable bearing near the other end ofthe roll, a retractable latch for securing the bearing in activeposition, an idler spindle in said bearing detachably engaging the roll,and means for retracting said spindle with relation to the bearing.

14. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles and the like, a beam connected tothe frame at one end and free at the other, a coating device below thebeam, a support detachably engaging the coating device near theconnected end of the beam, and a movable support carried by the free endof the beam and detachably engaging the coating device.

15. In .coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles and the like, a beam connected tothe frame at one end and free at the other, a coating device beloW thebeam, a support detachably engaging the coating device near theconnected end of the beam, a movable support carried bythe free end ofthe beam and detachably engaging the coating device, and a latch forsecuring the movable support in active position.

16. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles and the like, a beam connected atone of its ends to the frame and free at the other end, a coating rollbelow the beam, a rotary mounting near the connected end-of the beam anddetachably engaging the coating roll, a movable member carried by thefree end of the beam, and a rotary mounting carried by said member anddetachably engaging the coating roll.

17. In coating mechanism for tiles and the like, in combination, aframe, feeding means thereon for tiles and the like, a beam connected atone of its ends to the frame and free at the other end, a coating rollbe low the beam, a rotary mounting near the connected end of the beamand detachably engaging the coating roll, a movable member carried bythe free end of the beam, and a rotary mounting carried by said memberand detachably engaging the coating roll,

